There are 6.022 x10²³ molecule in 1 mole.
Multiply the number of moles by the Avogadro constant to get the total number of atoms or molecules in a sample. The equation reads as follows:
number of molecule= moles x avogadro's number
An equal amount of different gases measured at the same pressure and temperature each have the same number of molecules, and one mole of material has 6.022x10²³ atoms.
Avogadro's number is a ratio that compares the physical mass of an individual to the molar mass of an atom on an atomic scale. The quantity of elementary particles (atoms, molecules, compounds, etc.) in a mole of a substance is known as Avogadro's number. Its unit is the symbol NA and its mass is 6.022x 10²³ mol⁻¹.
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A subatomic particle found in the nucleus of every atom, this particle has a positive electrical charge called
In a reaction, 1 mole of silver nitrate combines with 1 mole of sodium chloride.
AgNO3 + NaCl
Which statement about the product is justified by the law of conservation of mass?
(1 point)
Responses
There will be five atoms in the product.
There will be five atoms in the product.
There will be two molecules in the product.
There will be two molecules in the product.
There will be 2 moles of sodium (Na) in the product.
There will be 2 moles of sodium (Na) in the product.
There will be 1 mole of silver (Ag) in the product
From the law of the conservation of mass, there would be two molecules in the product.
What is the law of the conservation of mass?We have to note that from the law of the conservation of mass, the total mass of the system must be constant. This implies that the initial mass of the system must be the same as the final mass of the system.
In this case, we have the reaction between the silver nitrate and the sodium chloride and we can see that the reaction is 1:1 and we have to apply the law of the conservation of mass here to know that there would be two molecules in the product.
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To convert the number of molecules of a compound to moles, you need to use which of the following?
A. Avogadros constant
B. Empirical formula
C. Formula mass
D. Molar mass
Answer:
A. Avogadro's constant
Explanation:
Avogadro's constant is a conversion factor that converts particle count to moles. One mole is 6.02x10^23 particles. The is written as (6.02x10^23 particles)/(1 mole particles.
Calculate the work done if:
F= 160 N and d = 0.1 m
Answer: 16 Nm
Explanation: Work is measured as Force times Displacement . Therefore , 160N X 0.1m = 16 Nm
Stoichiometry (Moles to Mass)
9. Calculate the number of moles of oxygen needed to oxidize 12.5 g of glucose (C6H12O6) into carbon dioxide & water.
10. If you needed to produce 10.7 moles of water, how many grams of glucose (C6H12O6) would be needed?
11. How many grams of glucose (C6H12O6) did your body consume if you exhale 100 moles of carbon dioxide?
Almost all stoichiometric problems can be resolved in only four easy steps.
How many moles of CO2 are created when 9.00 g of glucose C6H12O6 interacts with oxygen?Ok, so the amount of CO2 is 0.114 moles.According to the chemical reaction, two molecules of water dissociate into one molecule of oxygen and two molecules of water. Therefore, 2 moles of water are needed for every 1 mol of oxygen. Therefore, to make 19.2 moles of O2, 38.4 moles of water are needed.Almost all stoichiometric problems can be resolved in only four easy steps.The equation must be in balance.Convert the specified substance's units to moles.Determine the number of moles of substance produced by the reaction using the mole ratio.Convert required units from desired moles of a material.To learn more about stoichiometric problems refer to:
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think about an example of a structure it could be anything what changes could you make to make this structure more stable
Answer:
Remove/Add an electrons
Explanation:
Some chemicals find full octets more stable and strive to become one, so when you remove lone pairs you made the stucture more stable for instance. Or perhaps you add another element, for instance OH is stable but H₂O is VERY stable.
Explanation:
The maximum amount of water you can put in the metal box is 30996 cm^3 before it freeze and overflow
What number of moles of nitrogen are present in 12.0 mol of ammonia?
I think itight have been 8, but I am not sure
accumulation of pollutants at successive levels of the food chain___
Accumulation of pollutants at successive levels of the food chain is biomagnification.
What is biomagnification ?
When an organism's primary exposure source is its meal, biomagnification occurs when the chemical concentration in the organism exceeds the concentration in its food.
What is pollutants?
A material that may harm organisms (including people, plants, and animals) or violate environmental quality standards is referred to as a pollutant.
Therefore, accumulation of pollutants at successive levels of the food chain is biomagnification.
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The statement that an electron occupies the lowest available energy orbital is the ___________ principle
Aufbau principle states that each electron occupies the lowest energy orbital available.
What is meant by orbital ?
A zone around a nucleus of an atom or molecule that can have zero, one, or two electrons according to mathematics.Orbitals, or groups of electrons arranged in a cloudlike pattern, surround the nucleus.A three-dimensional representation of an electron's most likely position within an atom is called an orbital.The likelihood of discovering an electron near a hydrogen atom's nucleus is depicted in the diagram below. The 1s orbital has the highest likelihood, as you can see.The highest level of probability for an electron to occur is in an atomic orbital. The route that electrons travel while navigating the restrictions of the shell is referred to as a subshell. There are four different subshell classifications.To learn more about orbital refer to
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What could happen when the level of biodiversity is not maintained? Suggest 3 instances.
Because there are fewer species per trophic level, low biodiversity makes an ecosystem more susceptible to disturbance. Because the trophic levels are becoming more dependent on individual species rather than a collective of species at each trophic level, if one species disappears in this sort of ecosystem, the entire pyramid could collapse.
In order to manipulate some aspects of biodiversity, such as the number of species, and measure different sorts of ecosystem functioning or stability, biodiversity decreases must be taken into account. Functional group richness, species composition, species richness, species evenness, and genetic diversity are all factors that can affect how well an ecosystem function ecosystem.
Furthermore, species diversity and composition are frequently related to stability. Therefore, current changes in biodiversity will probably cause a subsequent change in the characteristics of an ecosystem.
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The mineral halite has cube-shaped crystals because: 1. there are no planes along which the mineral can break 2. cubes are the most common way two tetrahedrons can join 3. of the arrangement of atoms in the crystal lattice 4. halite is soluble in water
The mineral halite contains cube-shaped crystals because of the arrangement of atoms in the crystal lattice. Therefore, C: "of the arrangement of atoms in the crystal lattice." is the correct answer.
Halite, commonly known as table salt or rock salt, is made of sodium chloride (NaCl). It is essential for the life of humans and animals. The halite contains cube shape crystals that come from the organization of the sodium (Na+) and chloride (Cl–) ions. That means the cube-shaped crystals of the mineral halite are because of the arrangement of atoms within its crystal lattice.
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at 293 k, methanol has a vapor pressure of 97.7 torr and ethanol has a vapor pressure of 44.6 torr. what would be the vapor pressure of a mixture of 80 g of ethanol and 97 g of methanol at 293 k? please answer in torr and round to the first decimal place.
78.3 Torr would be the vapor pressure of a mixture of 80 g of ethanol and 97 g of methanol at 293 k
This question can be answered using Raoult's law and Dalton's law of partial pressure.
Raoult's law: Raoult postulated a mathematical relation between partial pressure and mole fraction. This connection is known as Raoult's Law, which asserts that the partial vapour pressure of each volatile component in a solution (obtained by dissolving a solute in a solvent) is directly proportionate to its mole fraction. The formula can be given by:
p₁= p₁⁰x₁ p₂=p₂⁰x₂
Here x denotes the mole fraction
p⁰ denotes the pressure in pure state.
Dalton's law: Dalton's law of partial pressure states that a gas mixture's total pressure is equal to the sum of its component gases' partial pressures. The pressure that each gas would produce if it filled the same volume of the mixture by itself at the same temperature is known as the partial pressure.
Mathematically,
p= p₁ + p₂
here p is the total pressure.
Now according to the given question
given mass of ethanol= 80 gm
moar mass of ethanol= 46 gm/mol
no. of moles= [tex]\frac{given mass}{molar mass} = \frac{80}{46} = 1.7 moles[/tex]
given mass of methanol= 97gm
molar mass of methanol= 32 gm/mol
no. of moles= [tex]\frac{given mass}{molar mass} = \frac{97}{32} = 3 moles[/tex] (approx.)
total number of moles= 1.7+3= 4.7 moles
mole fraction x for ethanol= [tex]\frac{1.7}{4.7} =0.36[/tex]
mole fraction of methanol= 1-0.36= 0.64
given pressure of ethanol in pure state= 97.7 Torr
given pressure of methanol in pure state= 44.6 Torr
Now from dalton's ;aw
total pressure is the sum of product of partial fraction and pressure in pure state for individual liquids.
P(total)= 0.36×44.6+ 0.64× 97.7= 78.3 Torr
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chemistry question help please (i accidentally clicked the one at the bottom im not sure if its right)
The correct translation for a pure metal in a chemical equation is as follows: the pure metal is translated into its elemental symbol with no subscripts (option C).
What is a pure metal?A pure metal is any metal that have not been alloyed with other metallic elements.
This means that pure metals are metals that are not mixed with other metals and are made of only one type of element.
Examples of pure metals are copper, aluminium, gold. In a chemical equation, the pure metals exist as a single element with no subscript attached.
Therefore, it can be said that option C is the correct description of a pure metal.
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explain why it takes more energy to remove the second electron from a lithium atom?
Lithium requires more energy to remove the second electron from a lithium atom.
What is electron ?
J.J. Thomson, an English physicist, first observed the electron in 1897 while researching cathode rays. The understanding of atomic structure was fundamentally altered by his discovery of electrons, which he initially referred to as corpuscles.
What is atom ?
A chemical element's atom is a particular type of particle of substance. A positively charged electron or many negatively charged electrons encircle the central nucleus of an atom. Protons and neutrons, two relatively hefty particles that make up the positively charged nucleus, may be present.
The second electron must be taken from the lithium atom's 1s orbital, which requires more energy, as opposed to the carbon atom's 2s orbital, which requires less energy to remove the fourth electron from.
Therefore, Lithium requires more energy to remove the second electron from a lithium atom.
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when heating a solution to boiling on a hot plate, start by ____
When heating the solution to boiling on the hot plate , start by starting and the stabilizing the stir function.
When we heat the solution to boil on the hot plate , it start by starting and the stabilizing the stir function. Then, turn the heat to a medium heat setting to start. If necessary, turn up the heat setting after waiting about ten minutes without seeing boiling.
The safety precautions that taken when heating the solution to boiling on a hot plate is to take proper inspection of the bottom flask for the cracks, irregularities or any of the imperfection.
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What is the kinetic energy of a. 500 kg?.
Answer: 2500J
Explanation: The formula of Kinetic Energy is 1/2mv^2
where m = mass of an object
v = velocity of an object
Therefore, Kinetic energy = 1/2*500*(5)^2
= 2500/2
= 1250 J
The question must be What is the kinetic energy of an object of mass 500kg and velocity 5m/s^2 ?
what is the percent yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen?
The percentage yield if 18 grams of water are produced when 4 grams of hydrogen with excess oxygen is 50.5%.
The theoretical yield (the greatest quantity of product that can be produced based on the stoichiometry of the reactants) and the actual yield must be known in order to compute the percentage yield of a reaction (the amount of product that is actually produced in the reaction).
The balanced equation for the reaction that creates water vapor (H2O) when hydrogen gas (H₂) and oxygen gas (O₂) are combined is:
2H₂ + O₂ -> 2H₂O
We can see from the equation that it is balanced that 1 mole of H₂O is created for every 2 moles of H₂. We use the molar mass of H₂, 2.016 g/mol, to convert 4 grams of H₂ to moles.
4g / 2.016 g/mol = 1.98 moles
We can now determine the hypothetical yield of water. The theoretical yield of H2O is: as 2 moles of H2O are created for every 2 moles of H2.
1.98 moles x (2 moles H2O / 2 moles H2) = 1.98 moles
Since water has an 18.02 g/mol molar mass, we may convert the theoretical yield of water from moles to grams as follows:
1.98 moles x 18.02 g/mol = 35.7 g
Divide the actual yield (18 g) by the theoretical yield (35.7 g), then multiply the result by 100 to find the percentage yield:
(18 g / 35.7 g) x 100 = 50.5 %
Therefore, the percentage yield of the reaction is 50.5%.
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determine the moles of sulfuric acid formed from 3.20 mol of sulfur dioxide
Answer:
3.2 moles of H2SO4
Explanation:
We need to start with a balanced equation. Lets assume the sulfuric acid is formed from sulfur dioxide and water.
SO2 + H2O = H2SO4
This equation is balanced. (Check it)
It tells us that 1 mole of SO2 will form 1 mole of H2SO4, if the reaction proceeds as planned. That's a molar ratio of 1 to 1. They are equal. What moles we react, we should expect the same number of moles of product. [And we need 1 mole of water at the same time]
So if we react 3.20 moles of sulfur dioxide, and keep out lab partner back, we'll obtain 3.2 moles of H2SO4.
What imilaritie and difference can you identify between neon ign and firework? What might be happening at the atomic level ti explain thee difference?
Neon lights and fireworks are both types of light sources that produce bright and colorful displays. However, the main difference between them is that neon lights are a continuous source of light, whereas fireworks are a transient source of light.
Neon lights produce light through the process of gas discharge, where an electric current is passed through a gas-filled tube, causing the gas to emit light. The light is produced by the excitation of atoms within the gas, which then release photons as they return to their ground state.
Fireworks, on the other hand, produce light through a chemical reaction, where a mixture of chemicals is ignited, producing a burst of light and color.
The light is produced by the energy released during the chemical reactions, which excites the atoms and molecules within the fireworks, causing them to emit light. The main difference is that neon lights rely on a continuous energy source while fireworks rely on a chemical reaction.
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Correctly paraphrased question:
What similarities and differences can you identify between neon signs and fireworks? What might be happening at the atomic level ti explain the difference?
Is CH3Cl a polar covalent bond?.
The CH3Cl possesses a net dipole because the C-Cl link is polar, making it polar as well.
A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed.
A polar covalent bond is a bond created by exchanging electrons between two atoms with different electronegativities.
The CH3Cl possesses a net dipole because the C-Cl link is polar, making it polar as well.
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How do you find the molecular mass of Class 11?.
To calculate the molecular mass, multiply the atomic mass of an element by the number of atoms in the molecule and then add the masses of all the elements in the molecule.
The mass of a molecule is denoted by its molecular mass or molecular weight.
A substance's molecular mass is the sum of the atomic masses of all the atoms in a molecule of the substance. It is expressed using the atomic mass unit (u).
The molecular weight calculator is based on a compound's molecular formula; it is not the simplest formula, which only includes the ratio of the types of atoms and not the number of each type of atom multiplied by its atomic weight and then added to the weights/ mass of the other atoms.
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Write the Lewis structure of each and state whether the following are monodentate or bidentate ligands a. C2042 (oxalate ion, Ox) b. SCN
c. H2NCH2CH2NH2 (ethylenediamine) d. CO32-
SCN- is a mono-dentate ligand, whereas C2O4-, Ethylenediamine, and CO3- are categorized as bidentate ligands.
What does "denticity of ligands" mean?
The quantity of electron pairs that the ligand shares with the metal atom or ion is known as the denticity of the ligand. Depending on how many ligand donor atoms bind to the metal atom or ion, ligands can be divided into mono-dentate and polydentate categories.
Mono-dentate ligands are ligands that share an electron pair with a single donor atom with a metal atom or ion. A metal ion and a bidentate ligand combine to produce a 5- or 6-membered ring. Three donor atoms can connect to a single metal atom or cation in tridentate ligands.
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Mention the elements and the ratio by mass of elements present in:
[
The ratio by mass of element ammonia is 14:3. and the ratio by mass of element carbon dioxide is 3:8.
What do you mean by mass of an element ?The atomic mass, the quantity of matter possess in an atom of an element. It is represented as a multiple of one-twelfth the mass of the carbon-12 atom.
In the ammonia molecule, nitrogen and hydrogen are always present in the ratio 14:3 by mass, whatever the form in which it is obtained.
In every sample of carbon dioxide, there is 32.0 gram of oxygen is present for each 12.0 gram of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 3:8.
Thus, The ratio by mass of element ammonia is 14:3. and the ratio by mass of element carbon dioxide is 3:8.
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Your question is incomplete, most probably your question was
Mention the elements and the ratio by mass of elements present in:
Ammonia & Carbon dioxide
What is the compound name of BaSO4?
What is the molar mass?
What is the mass in grams of 2.3 mols of the compound
The inorganic substance with the chemical formula BaSO4 is barium sulfate (or sulphate). It is a tasteless, crystalline white substance that is insoluble in water.
BaSO4 stands for barium sulfate.A barium cation and a sulfate anion are the two elements that make up barium sulfate. There are four oxygen atoms joined to the sulfur. A sulfate salt of barium, known as BaSO4, is present in the mineral barite. It is a white crystalline substance that is soluble in strong acids but insoluble in water and alcohol.
Is barium the same as bromine?Elements include both barium and bromine. Barium is a metal belonging to Group 2 of the modern periodic table, and bromine is a non-metal belonging to Group 17 (halogen).
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How many moles of h3po4 are in grams
There is no direct conversion from moles to grams. You need to know the molar mass of H3PO4 to calculate the number of grams. The molar mass of H3PO4 is 97.99 g/mol.
What is Molar mass?
Molar mass is the mass of one mole of a given substance, measured in grams per mole (g/mol). It is a unit of measurement used to determine the amount of a substance in a sample. The molar mass of a substance is related to its molecular weight, which is the sum of the atomic weights of all atoms in the molecule.
Therefore, There is no direct conversion from moles to grams.
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A sealed container can hold
0.325 L of gas at 1.00 atm
and 293 K. How many moles of gas
can the container hold?
Answer:
0.0135 moles
Explanation:
You want to know the number of moles of gas in a 0.325 L container at 1.00 atm and 293 K.
MolesThe ideal gas law is ...
PV = nRT
Solving for n, the number of moles can be found as ...
n = PV/(RT)
n = (101.325 kPa)(0.325 L)/(8.3145 L·kPa/(K·mol)·293 K) ≈ 0.0135 mol
The container can hold 0.0135 moles of gas.
__
Additional comment
1.00 atm = 101.325 kPa
What mass contains 32.8 mmol of F2(g)?
Answer:
To determine the mass that contains 32.8 mmol of F2(g), we need to use the molar mass of F2 and the formula:
mass = number of moles x molar mass
The molar mass of F2 is 38.00 g/mol. Therefore, the mass that contains 32.8 mmol of F2 is:
mass = 32.8 mmol x 38.00 g/mol = 1239.2 g
so the mass that contains 32.8 mmol of F2(g) is 1239.2 g
It's important to note that the unit "mmol" is used for molar amount of a substance, which is defined as the number of moles of a substance per one litre of solution or per one kilogram of solvent.
in step 6 of the citric acid cycle when succinate is converted to fumarate, hydrogen atoms are transferred to fad. the ____________ is catalyzed by a dehydrogenase enzyme.
The cycle of citric acid Hydrogen atoms are transported to FAD during the conversion of succinate to fumarate. This process is catalyzed by a succinate dehydrogenase enzyme.
During the process of succinate dehydrogenation, succinate is oxidized to fumarate by losing electrons, which are transferred to FAD, reducing it to FADH2. This transfer of electrons from succinate to FAD is an oxidation-reduction reaction, also known as redox reaction. The energy released during this reaction is harnessed to generate ATP, which is an important energy currency for the cell. Succinate dehydrogenase is an enzyme complex that contains multiple subunits and cofactors, including flavin adenine dinucleotide (FAD) and iron-sulfur clusters. It is located in the inner mitochondrial membrane, which allows it to transfer electrons to the electron transport chain, leading to the production of ATP. It's important to note that the citric acid cycle is a crucial metabolic pathway that takes place in the mitochondria of eukaryotic cells, and it is also known as the TCA cycle or Krebs cycle. The cycle is a series of chemical reactions that converts acetyl-CoA, derived from carbohydrates, fats, and proteins, into carbon dioxide and water, releasing energy in the form of ATP, hydrogen atoms other high-energy molecules.
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A macromolecule that contains sugar, phosphate group and nitrogenous base: ___
Nucleotide . A nucleotide is made up of a sugar molecule (ribose in RNA or deoxyribose in DNA) linked to a phosphate group and a nitrogenous base Two strands make up a DNA molecule.
Adenine (A), cytosine (C), guanine (G), and thymine are the bases utilized in DNA (T). Nitrogenous base: A nitrogen-containing molecule with the chemical characteristics of a base. Adenine (A), guanine (G), thymine (T), and cytosine are the nitrogenous bases found in DNA (C). With one exception, the nitrogenous bases of RNA are the same: adenine (A), guanine (G), uracil (U), and cytosine (C). The DNA molecule is a nucleotide polymer. A nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group make up each nucleotide. DNA has four nitrogenous bases, two purines (adenine and guanine), and two pyrimidines (cytosine and thymine). Two strands make up a DNA molecule.
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Oxides of active metals, such as CaO, react with water to produce...
A) Metal Carbonates
B) Metal Hydrides
C) Metal Hydroxides
D) Acids
Metal hydroxides are created when the water reacts with the oxidized forms of active metals, such as CaO.
What occurs when water and a metal oxide combine?The basic-natured metal hydroxides are created when metal oxides and water react. The energy released during these reactions is substantial. An example reaction is the formation of calcium hydroxide, a basic solution, when calcium oxide and water are combined.Metals that are actively occurring are very reactive. Metal hydroxides are created when the active metals' oxides and water react. example: Calcium hydroxide is produced when calcium oxide combines with water.Metal hydroxides are created when the water reacts with the oxidized forms of active metals, such as CaO.To learn more about metal oxide refer to:
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